Melo, Cármem Ozana de. “Change in the Pattern of Behavior of Corn Prices in the State of Paraná from 2001 to 2019”. Revista de Política Agrícola 30, no. 1 (April 24, 2021): 7. Accessed September 20, 2026. https://rpa.sede.embrapa.br/RPA/article/view/1541.